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Related party transactions (Details) - EUR (€) € in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2022 | Dec. 31, 2021 | Dec. 31, 2020
Related party transactions (Details) [Line Items] |  |  |
Property plant and equipment |  | € 774 |
Administration fees | € 3,412 | 2,963 | € 2,143
Management fees | 0 | 450 | 450
Development costs | 1,095 |  |
Interest expense | 0 | 338 | 261
Interest loan expense from other shareholder | 0 | 1,625 | 1,070
ads-tec Engineering GmbH [Member] |  |  |
Related party transactions (Details) [Line Items] |  |  |
Development costs |  | 1,479 | € 262
ads-tec Industrial IT GmbH [Member] |  |  |
Related party transactions (Details) [Line Items] |  |  |
Comprise liability | 1,167 | 12 |
ads-tec Administration GmbH [Member] |  |  |
Related party transactions (Details) [Line Items] |  |  |
Comprise liability | 476 | 838 |
ads-tec Dresden GmbH [Member] |  |  |
Related party transactions (Details) [Line Items] |  |  |
Comprise liability | € 28 | € 1,199 |

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